Ecosystems

This food web represents organisms in a field. What role do raccoons play in this food web? (5.9B)

• Prey

• Producer

• Decomposer

• Consumer

The diets of several types of prairie animals are described in the table. Which of the following prairie food chains is in the correct order? (5.9B)

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Which table shows the correct role of each organism in the food chain below? (5.9B)

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In a food chain, energy does NOT flow directly from-- (5.9B)

• producer to decomposer

• producer to consumer

• consumer to decomposer

• consumer to producer

The food web shown is made up of organisms that live in a forest. Which change would most likely occur if all the producers in this ecosystem were removed? (5.9B)

• The mice would become the new producers.

• All the animals would either die or move away.

• The number of mice would increase.

• All the animal populations would increase.

A freshwater ecosystem has various food webs. One of these food webs is shown here. Which organisms transfer the most energy within the food web? (5.9B)

• Bass, because they are predators in this web

• Copepods, because they support two chains in this web

• Crayfish, because they are at the bottom of this web

• Algae, because they are the producers in this web

A food web for some organisms in an African rain forest is shown below. Which organisms in this food web eat only consumers? (5.9B)

• Okapis

• Civets

• Leopards

• Gorillas

A partial food web of a pond ecosystem is shown. Which type of organism is missing from this food web? (5.9B)

• Decomposers

• Producers

• Predators

• Consumers

A partial forest food web is shown. In this food web, energy is transferred directly between--- (5.9B)

• conifer seeds and red crossbills

• conifer leaves and northern goshawks

• blue grouse and wolves

• elk and sharp-shinned hawks

Many desert animals depend on the prickly pear cactus. What role does the prickly pear cactus play in a desert food web? (5.9B)

• It obtains energy from producers.

• It returns nutrients to the soil.

• It preys upon other organisms.

• It provides energy to consumers.